I downloaded the ECLiPSe, but...

To Joachim Schimpf:

Thank you for the access password to me.
But I have some problems... 

First, in my signed license: 
I omitted the nation name, 'South Korea'. It's my fault.

Second is following:
I downloaded the ECLiPSe files, and I executed them.
It is wonderful! 
It fascinated me!
However, I think that the font in the ECLiPSe environment is too small. So, I decided to modify it. I selected the menu item in the main menu bar and found preference(I don't sure that it is preference or others). And, I modified then clicked the save button.
The problems began! 
I cannot see the screen of first the ECLiPSe files were installed anymore. Only some part of big character was displayed. If you want to see this, I can capture it, and send it to you.
Commonly, many applicational environment have their preference to control environmental properties. The ECLiPSe environment also has it, I think.
The ECLiPSe environment was written in Tcl/Tk, is it right? I am poor at Tcl/Tk. I tried to find the preference file in my computer hard disk, but in vain. 
I removed the ECLiPSe environment and Tcl/Tk, then re-installed.  But the result was the same.
What shall I do?  I am eager to use the ECLiPSe environment.
I am very sorry for asking about these problems. But it is my good chance to use the ECLiPSe environment, and it will make me to further good computing, I believe.
Thank you for your kindness, and I am looking forward to your good solution.

                     Sincerely,

                               Bo-Young Ohm.